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Texas Instruments Easy Configuration of BQ76942/52 Battery Monitors Application notes
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Application Report
SLUA991 – December 2019
Easy Configuration of BQ76942/52 Battery Monitors
Matt Sunna
ABSTRACT
This application report contains a variety of information to assist the user in configuring the BQ76942 and
BQ76952 family of battery monitors. The document provides multiple examples of common configurations
to help to user gain familiarity with the device settings.
Trademarks
All trademarks are the property of their respective owners.
1
Introduction
The family of battery monitors that includes the BQ76942 and BQ76952 includes many configuration
options to serve a wide range of applications. This document uses the BQ76942 Evaluation Module and
Battery Management Studio to demonstrate several different configuration examples. These examples can
also be applied to the BQ76952. This document also includes an example .gg file which can be loaded
onto an evaluation module using Battery Management Studio. The BQ76942 Evaluation Module User's
Guide includes basic information on setting up the device, and this document should be used along with
this guide.
2
Basic Configuration
After going through the Quick Start section of the BQ76942 Evaluation Module User's Guide, refer to the
following sections for the next steps on configuring the device. This initial version of the application report
is using early samples of the BQ76942. The application report will be updated when the production
revision of silicon becomes available. More detailed information for each feature is available in the
BQ76942 device data sheet. Battery Management Studio also includes tool tips that give detailed
descriptions of the different settings as the mouse pointer moves over different fields.
2.1
Regulator Settings
The BQ76942 and BQ76952 include a 1.8-V regulator (REG18) and two LDOs (REG1 and REG2) with
multiple voltage options. The REG18 supply is not configurable and is only used for internal circuitry, while
REG1 and REG2 are configurable and can be used to power external circuitry. Multiple device features
can reference REG1, so it is important for REG1 to be enabled for these features. The evaluation module
also uses REG1 as a pull-up voltage for multiple pins, so it is recommended to enable the pre-regulator
(REG0) and REG1.
The following example shows how to enable REG0, REG1, and REG2. REG1 and REG2 can be set to 1.8
V, 2.5 V, 3.0 V, 3.3 V, or 5.0 V. The following example sets REG1 to 3.3 V and REG2 to 2.5 V. The
options to configure REG1 and REG2 are also shown in Figure 1.
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Figure 1. Enabling REG0, Enabling REG1 to 3.3 V and REG2 to 2.5 V
2.2
Number of Cells
The number of series cells for the application can be configured in the Vcell Mode register. The
evaluation module includes a resistor divider to simulate cells for all cell inputs, so all cells can be enabled
when using the evaluation module. To reduce the cell count, follow the instructions in the BQ76942
Evaluation Module User's Guide to update the hardware and update VCell Mode accordingly. In the
following example, the cell count for BQ76942 is reduced to 8 cells to match the example in the Evaluation
Module User's Guide.
Figure 2. Configuring 8 Cells for BQ76942
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2.3
Enabling Protections
Various device protections can be enabled through the Enabled Protections A, Enabled Protections B,
and Enabled Protections C registers. In the default settings, only COV and SCD faults are enabled. In
Figure 3, all available protections are enabled. Additional registers can configure how the BQ76942
controls the CHG and DSG FETs in response to each protection being triggered. CHG FET Protections
A, CHG FET Protections B, and CHG FET Protections C configure how the CHG FET should be
controlled. DSG FET Protection A, DSG FET Protection B, and DSG FET Protection C configure how
the DSG FET should be controlled.
When the CHG and DSG FETs are configured in series (these FETs are in series on the evaluation
module), the Body Diode Threshold protection helps to prevent damage to the FETs. If the CHG FET is
off and the device detects discharge current larger than this threshold, the CHG FET is turned on to
protect the CHG FET body diode until the discharge current is removed. The reverse is true for the DSG
FET when a charge current is detected above this threshold. This feature is not used if the FETs are
configured in parallel. Configuration of FET control is covered more in Section 2.8.
Secondary protections can react to more serious faults to take action to disable the pack. Configuration of
Permanent Failures is very similar to the configuration of the primary protections. These can be configured
through the Permanent Failure registers.
Figure 3. Enabling All Protections
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2.3.1
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Voltage Protections
Voltage protections (over-voltage and under-voltage) can be enabled using Enabled Protections A.
There are multiple parameters associated with each protection feature that can be adjusted based on the
application. In the following example, the Threshold and Delay parameters for CUV (cell under-voltage)
and COV (cell over-voltage) have been modified from the default values under the Protections settings.
Parameters are translated from their register values into units for convenient display in BQStudio. For
example CUV Threshold can only be programmed in 50-mV increments and CUV Delay can only be
programmed in 3.3-ms increments. When entering new values into these fields, BQStudio will round to the
nearest valid value.
Figure 4. Setting Voltage Protection Parameters
2.3.2
Current Protections
Current protections (over-current and short-circuit detect) can be enabled under Enabled Protections A
and Enabled Protections C. The parameters for each of these can be modified under the Protections
settings. In the following example, several of the current protections parameters have been modified from
the default values.
Figure 5. Setting Current Protection Parameters
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2.3.3
Temperature Protections
Temperature protections can be enabled under Enabled Protections B. The parameters for each of
these can be modified under the Protections settings. In the following example, the OTC (Overtemperature in charge) Threshold and OTD (Over-temperature in discharge) Threshold have been
modified from the default values.
Figure 6. Setting Temperature Protection Parameters
2.3.4
Other Protections
Pre-charge Timeout and Host Watchdog protections can be enabled under Enabled Protections C. In the
following example, the HWD (Host Watchdog) fault delay and PTO (Precharge Timeout) delay have been
modified from the default values.
Figure 7. Setting PTO and HWD Parameters
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2.4
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Thermistors
Several device pins have multiple functions. Some pins can be configured to interface with external
thermistors in addition to the TSx pins. The following example shows TS1 configured for an external
thermistor measuring a cell temperature, TS2 is unused, TS3 is configured for an external thermistor
measuring FET temperature, and the HDQ pin is configured for an external thermistor where the
temperature is reported but not used for protections. The thermistor pin settings are highly configurable,
so refer to the data sheet if using a thermistor different from the default. (The default values are set to
match the Semitec 103-AT and 204AP-2 thermistors.)
For detailed configuration options for thermistor pins, see the BQStudio tool tips or the Multifunction Pin
Options for Thermistor or ADCIN Pins table in the BQ76942 device data sheet.
Figure 8. Enabling Additional Thermistors
2.5
General Purpose Outputs
Some device pins can be configured as GPOs (general purpose outputs). There are multiple options when
setting the pins as GPOs. In the following example the CFETOFF, DFETOFF, HDQ, DCHG, and DDSG
pins are configured to drive between 0 V and 3.3 V (voltage of REG1). The full list of commands to control
each of the GPO pins is listed in the General Purpose Digital Output Subcommands table in the device
data sheet. The description of each of the [OPT] register bits is described in the BQStudio tool tips as well
as the Multifunction Pin Options for ALT or GPO Pins table in the device data sheet.
Figure 9. Enabling Multiple General Purpose Outputs
Figure 10. Setting CFETOFF as a GPO with Active-High Output Using REG1 High Drive Level
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2.6
ADC Inputs
Multiple device pins can also be configured as general purpose ADC inputs. The following example
demonstrates setting CFETOFF, DFETOFF, ALERT, TS1, TS2, TS3, HDQ, DCHG, and DDSG as general
purpose ADC inputs. The BQStudio tool tips gives a detailed description for each of the [OPT] bits. When
set as a general purpose ADC input, the [OPT] bits should always be set as shown in the following
example (OPT5, OPT3, OPT2 set to 1, OPT4, OPT1, OPT0 set to 0).
Figure 11. Enabling Multiple ADC Inputs
Figure 12. Configuring the HDQ Pin as a General Purpose ADC Input
2.7
ALERT Pin
The ALERT pin can be configured to send an interrupt to the host to communicate when a fault is
detected. The following example sets the ALERT pin as an active-high output referencing REG1 for the
output voltage drive level. The PIN_FXN bits configure the ALERT pin to function as an ALERT function.
Figure 13. Configuring ALERT Pin Function
Figure 14. Setting ALERT with Active-High Output Using REG1 High Drive Level
There are many events that can be mapped to the ALERT pin to notify the host. The Default Alarm Mask
register can be configured to control which events are mapped to the ALERT pin. The SF Alert Mask and
PF Alert Mask registers can further control which safety alert and permanent fail alerts are mapped to the
ALERT pin.
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Figure 15. Alarm Registers
Figure 16. Setting Events Mapped to ALERT Pin Using Default Alarm Mask Register
2.8
FET Control Settings
There are multiple methods of FET control supported on the BQ76942 and BQ76952 devices. By default,
the device will autonomously control the FETs based on fault conditions and recovery from these faults.
The device can also be configured to allow the host to partially or fully control the FETs. This section
describes some of the basic configurations.
Upon initial power-up of the device the FETs are disabled by default. Sending the FET_ENABLE
command will turn the FETs on. Figure 17 shows the default settings for the FET Options register. In this
configuration, the FET_CTRL_EN bit enables the device to enable the FETs. Setting the HOST_FET_EN
bit enables FET control commands from the host and also allows the host to use the CFETOFF and
DFETOFF pins when those pins are configured to control the FETs. The SFET bit enables body diode
protection for FETs configured in a series configuration like on the BQ76942 Evaluation Module.
Figure 17. FET Options Default Settings
Figure 18. FET Options with Host Control Enabled
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2.8.1
CFETOFF and DFETOFF
CFETOFF and DFETOFF can be set up to allow the host to disable the CHG and DSG FETs using these
pins. The following example shows CFETOFF and DFETOFF configured as inputs to allow the host to
disable the FETs using these pins.
Figure 19. Configuring CFETOFF and DFETOFF for FET Control
Figure 20. CFETOFF Configuration Register
2.8.2
DCHG and DDSG
The device can be configured to send a signal to the host processor or to external circuitry whenever fault
conditions indicate the CHG and DSG FETs should be disabled through the DCHG and DDSG pins. In the
following example, these pins are configured as active-high outputs with high drive level of REG1.
Figure 21. Configuring DCHG and DDSG as Outputs to MCU
Figure 22. DCHG Configuration Register
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GG File Example
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GG File Example
Battery Management Studio allows the user to import and export images of all device register settings to
text files with a .gg.csv extension. The following example configures the listed settings with the changes
from the defaults highlighted in green. To use the following example, click on Export -> Export Defaults in
the Data Memory screen of BQStudio with an EVM connected. The saved file can be edited with a text
editor to make the highlighted changes and loaded onto the device using BQStudio by clicking Import ->
Import from a File.
• Pre-regulator enabled, REG1 = 3.3 V, REG2 = 2.5 V
• CFETOFF and DFETOFF configured as inputs for FET Control
• DCHG and DDSG configured as active-high outputs to MCU
• ALERT configured as active-high output to MCU
• TS1 configured for cell temperature thermistor, TS3 configured for FET temperature thermistor, HDQ
configured for temperature measurement without protections
• VCell Mode register set for 8 cells
• All protections enabled
• SOV and SUV permanent faults enabled
• FUSE bit set in Default Alarm Mask register
• HOST_FEN_EN and SLEEPCHG bits set in FET Options register
• FET_EN in Mfg Status Init register set
* Texas Instruments Data Flash File
* File created Tue Nov 05 17:43:49 2019
*
* Device Number 7694
* Firmware Version 0.24
* Build Number 24
* Order Number 0
*
* bqz Device Number 7692
* bqz Firmware Version 0.24
* bqz Build Number 24
*
* Field Order: Class name, Subclass name, Parameter name, Parameter Value, Display Units
"Calibration","Voltage","Cell 1 Gain","12160","-"
"Calibration","Voltage","Cell 2 Gain","12160","-"
"Calibration","Voltage","Cell 3 Gain","12160","-"
"Calibration","Voltage","Cell 4 Gain","12160","-"
"Calibration","Voltage","Cell 5 Gain","12151","-"
"Calibration","Voltage","Cell 6 Gain","12151","-"
"Calibration","Voltage","Cell 7 Gain","12151","-"
"Calibration","Voltage","Cell 8 Gain","12151","-"
"Calibration","Voltage","Cell 9 Gain","12151","-"
"Calibration","Voltage","Cell 10 Gain","12151","-"
"Calibration","Voltage","Pack Gain","35507","-"
"Calibration","Voltage","TOS Gain","35507","-"
"Calibration","Voltage","LD Gain","35507","-"
"Calibration","Voltage","ADC Gain","4052","-"
"Calibration","Current","CC Gain","1.000","mO"
"Calibration","Current","Capacity Gain","1.000","mO"
"Calibration","Vcell Offset","Vcell Offset","0","mV"
"Calibration","V Divider Offset","Vdiv Offset","0","userV"
"Calibration","Current Offset","Coulomb Counter Offset Samples","64","-"
"Calibration","Current Offset","Board Offset","0","-"
"Calibration","Temperature","Internal Temp Offset","0.0","°C"
"Calibration","Temperature","CFETOFF Temp Offset","0.0","°C"
"Calibration","Temperature","DFETOFF Temp Offset","0.0","°C"
"Calibration","Temperature","ALERT Temp Offset","0.0","°C"
"Calibration","Temperature","TS1 Temp Offset","0.0","°C"
"Calibration","Temperature","TS2 Temp Offset","0.0","°C"
"Calibration","Temperature","TS3 Temp Offset","0.0","°C"
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"Calibration","Temperature","HDQ Temp Offset","0.0","°C"
"Calibration","Temperature","DCHG Temp Offset","0.0","°C"
"Calibration","Temperature","DDSG Temp Offset","0.0","°C"
"Calibration","Internal Temp Model","Int Gain","25390","-"
"Calibration","Internal Temp Model","Int base offset","33","-"
"Calibration","Internal Temp Model","Int Maximum AD","16383","-"
"Calibration","Internal Temp Model","Int Maximum Temp","6379","0.1K"
"Calibration","18K Temperature Model","Coeff a1","-11130","-"
"Calibration","18K Temperature Model","Coeff a2","19142","-"
"Calibration","18K Temperature Model","Coeff a3","-19262","-"
"Calibration","18K Temperature Model","Coeff a4","28203","-"
"Calibration","18K Temperature Model","Coeff a5","892","-"
"Calibration","18K Temperature Model","Coeff b1","328","-"
"Calibration","18K Temperature Model","Coeff b2","-605","-"
"Calibration","18K Temperature Model","Coeff b3","-2443","-"
"Calibration","18K Temperature Model","Coeff b4","4696","-"
"Calibration","18K Temperature Model","Adc0","11703","-"
"Calibration","180K Temperature Model","Coeff a1","-17513","-"
"Calibration","180K Temperature Model","Coeff a2","25759","-"
"Calibration","180K Temperature Model","Coeff a3","-23593","-"
"Calibration","180K Temperature Model","Coeff a4","32175","-"
"Calibration","180K Temperature Model","Coeff a5","2090","-"
"Calibration","180K Temperature Model","Coeff b1","-2055","-"
"Calibration","180K Temperature Model","Coeff b2","2955","-"
"Calibration","180K Temperature Model","Coeff b3","-3427","-"
"Calibration","180K Temperature Model","Coeff b4","4385","-"
"Calibration","180K Temperature Model","Adc0","17246","-"
"Calibration","Custom Temperature Model","Coeff a1","0","-"
"Calibration","Custom Temperature Model","Coeff a2","0","-"
"Calibration","Custom Temperature Model","Coeff a3","0","-"
"Calibration","Custom Temperature Model","Coeff a4","0","-"
"Calibration","Custom Temperature Model","Coeff a5","0","-"
"Calibration","Custom Temperature Model","Coeff b1","0","-"
"Calibration","Custom Temperature Model","Coeff b2","0","-"
"Calibration","Custom Temperature Model","Coeff b3","0","-"
"Calibration","Custom Temperature Model","Coeff b4","0","-"
"Calibration","Custom Temperature Model","Rc0","0","-"
"Calibration","Custom Temperature Model","Adc0","0","-"
"Calibration","Current Deadband","Coulomb Counter Deadband","9","234nV"
"Settings","Fuse","Min Blow Fuse Voltage","5000","mV"
"Settings","Fuse","Fuse Blow Timeout","30","s"
"Settings","Configuration","Power Config","0102","Hex"
"Settings","Configuration","REG12 Config","fd","Hex"
"Settings","Configuration","REG0 Config","01","Hex"
"Settings","Configuration","HWD Regulator Options","00","Hex"
"Settings","Configuration","Comm Type","00","-"
"Settings","Configuration","I2C Address","00","-"
"Settings","Configuration","Comm Idle Time","255","s"
"Settings","Configuration","CFETOFF Pin Config","02","Hex"
"Settings","Configuration","DFETOFF Pin Config","02","Hex"
"Settings","Configuration","ALERT Pin Config","2a","Hex"
"Settings","Configuration","TS1 Config","07","Hex"
"Settings","Configuration","TS2 Config","00","Hex"
"Settings","Configuration","TS3 Config","0f","Hex"
"Settings","Configuration","HDQ Pin Config","0b","Hex"
"Settings","Configuration","DCHG Pin Config","2a","Hex"
"Settings","Configuration","DDSG Pin Config","2a","Hex"
"Settings","Configuration","DA Configuration","05","Hex"
"Settings","Configuration","Vcell Mode","033f","Hex"
"Settings","Configuration","CC3 Samples","80","Num"
"Settings","Protection","Protection Configuration","0012","Hex"
"Settings","Protection","Enabled Protections A","fc","Hex"
"Settings","Protection","Enabled Protections B","f7","Hex"
"Settings","Protection","Enabled Protections C","f6","Hex"
"Settings","Protection","CHG FET Protections A","98","Hex"
"Settings","Protection","CHG FET Protections B","d5","Hex"
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"Settings","Protection","CHG FET Protections C","56","Hex"
"Settings","Protection","DSG FET Protections A","e4","Hex"
"Settings","Protection","DSG FET Protections B","e6","Hex"
"Settings","Protection","DSG FET Protections C","e2","Hex"
"Settings","Protection","Body Diode Threshold","50","mA"
"Settings","Alarm","Default Alarm Mask","f808","Hex"
"Settings","Alarm","SF Alert Mask A","fc","Hex"
"Settings","Alarm","SF Alert Mask B","f7","Hex"
"Settings","Alarm","SF Alert Mask C","f6","Hex"
"Settings","Alarm","PF Alert Mask A","5f","Hex"
"Settings","Alarm","PF Alert Mask B","9f","Hex"
"Settings","Alarm","PF Alert Mask C","00","Hex"
"Settings","Alarm","PF Alert Mask D","00","Hex"
"Settings","Permanent Failure","Enabled PF A","03","Hex"
"Settings","Permanent Failure","Enabled PF B","00","Hex"
"Settings","Permanent Failure","Enabled PF C","07","Hex"
"Settings","Permanent Failure","Enabled PF D","00","Hex"
"Settings","FET","FET Options","0f","Hex"
"Settings","FET","Chg Pump Control","01","Hex"
"Settings","FET","Precharge Start Voltage","0","mV"
"Settings","FET","Precharge Stop Voltage","0","mV"
"Settings","FET","Predischarge Timeout","5","10ms"
"Settings","FET","Predischarge Stop Delta","500","mV"
"Settings","Current Thresholds","Dsg Current Threshold","100","userA"
"Settings","Current Thresholds","Chg Current Threshold","50","userA"
"Settings","Cell Open-Wire","Check Time","5","s"
"Settings","Interconnect Resistances","Cell 1 Interconnect","0","mO"
"Settings","Interconnect Resistances","Cell 2 Interconnect","0","mO"
"Settings","Interconnect Resistances","Cell 3 Interconnect","0","mO"
"Settings","Interconnect Resistances","Cell 4 Interconnect","0","mO"
"Settings","Interconnect Resistances","Cell 5 Interconnect","0","mO"
"Settings","Interconnect Resistances","Cell 6 Interconnect","0","mO"
"Settings","Interconnect Resistances","Cell 7 Interconnect","0","mO"
"Settings","Interconnect Resistances","Cell 8 Interconnect","0","mO"
"Settings","Interconnect Resistances","Cell 9 Interconnect","0","mO"
"Settings","Interconnect Resistances","Cell 10 Interconnect","0","mO"
"Settings","Manufacturing","Mfg Status Init","0050","Hex"
"Settings","Cell Balancing Config","Balancing Configuration","00","Hex"
"Settings","Cell Balancing Config","Min Cell Temp","-20","°C"
"Settings","Cell Balancing Config","Max Cell Temp","60","°C"
"Settings","Cell Balancing Config","Cell Balance Interval","20","s"
"Settings","Cell Balancing Config","Cell Balance Min Cell V (Charge)","3900","mV"
"Settings","Cell Balancing Config","Cell Balance Min Delta (Charge)","40","mV"
"Settings","Cell Balancing Config","Cell Balance Min Cell V (Relax)","3900","mV"
"Settings","Cell Balancing Config","Cell Balance Min Delta (Relax)","40","mV"
"Power","Shutdown","Shutdown Cell Voltage","0","mV"
"Power","Shutdown","Shutdown Stack Voltage","6000","mV"
"Power","Shutdown","Shutdown Temperature","85","°C"
"Power","Shutdown","Shutdown Temperature Delay","5","s"
"Power","Shutdown","Charger Present Threshold","3000","mV"
"Power","Shutdown","FET Off Delay","0","0.25s"
"Power","Shutdown","Shutdown Command Delay","0","0.25s"
"Power","Shutdown","Auto Shutdown Time","0","min"
"Power","Shutdown","RAM Fail Shutdown Time","5","s"
"Power","Sleep","Sleep Current","20","mA"
"Power","Sleep","Voltage Time","5","s"
"Power","Sleep","Wake Comparator Current","500","mA"
"Power","Sleep","Sleep Hysteresis Time","10","s"
"Power","Sleep","Sleep Charger Voltage Threshold","20000","mV"
"Power","Sleep","Sleep Charger PACK-TOS Delta","100","mV"
"System Data","Integrity","Config RAM Signature","0000","Hex"
"Protections","CUV","Threshold","2500","mV"
"Protections","CUV","Delay","251","ms"
"Protections","CUV","Recovery Hysteresis","100","mV"
"Protections","COV","Threshold","4300","mV"
"Protections","COV","Delay","251","ms"
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"Protections","COV","Recovery Hysteresis","100","mV"
"Protections","COVL","Latch Limit","0","-"
"Protections","COVL","Counter Dec Delay","10","s"
"Protections","COVL","Recovery Time","15","s"
"Protections","OCC","Threshold","4","mV"
"Protections","OCC","Delay","20","ms"
"Protections","OCC","Recovery Threshold","-200","mA"
"Protections","OCC","PACK-TOS Delta","100","mV"
"Protections","OCD1","Threshold","8","mV"
"Protections","OCD1","Delay","10","ms"
"Protections","OCD2","Threshold","6","mV"
"Protections","OCD2","Delay","30","ms"
"Protections","SCD","Threshold","0","-"
"Protections","SCD","Delay","15","µs"
"Protections","SCD","Recovery Time","5","s"
"Protections","OCD3","Threshold","-4000","userA"
"Protections","OCD3","Delay","2","s"
"Protections","OCD","Recovery Threshold","200","mA"
"Protections","OCDL","Latch Limit","0","-"
"Protections","OCDL","Counter Dec Delay","10","s"
"Protections","OCDL","Recovery Time","15","s"
"Protections","OCDL","Recovery Threshold","200","mA"
"Protections","SCDL","Latch Limit","0","-"
"Protections","SCDL","Counter Dec Delay","10","s"
"Protections","SCDL","Recovery Time","15","s"
"Protections","SCDL","Recovery Threshold","200","mA"
"Protections","OTC","Threshold","55","°C"
"Protections","OTC","Delay","2","s"
"Protections","OTC","Recovery","50","°C"
"Protections","OTD","Threshold","60","°C"
"Protections","OTD","Delay","2","s"
"Protections","OTD","Recovery","55","°C"
"Protections","OTF","Threshold","80","°C"
"Protections","OTF","Delay","2","s"
"Protections","OTF","Recovery","65","°C"
"Protections","OTINT","Threshold","85","°C"
"Protections","OTINT","Delay","2","s"
"Protections","OTINT","Recovery","80","°C"
"Protections","UTC","Threshold","0","°C"
"Protections","UTC","Delay","2","s"
"Protections","UTC","Recovery","5","°C"
"Protections","UTD","Threshold","0","°C"
"Protections","UTD","Delay","2","s"
"Protections","UTD","Recovery","5","°C"
"Protections","UTINT","Threshold","-20","°C"
"Protections","UTINT","Delay","2","s"
"Protections","UTINT","Recovery","-15","°C"
"Protections","Recovery","Time","3","s"
"Protections","HWD","Delay","60","s"
"Protections","Load Detect","Active Time","0","s"
"Protections","Load Detect","Retry Delay","50","s"
"Protections","Load Detect","Timeout","1","hrs"
"Protections","PTO","Charge Threshold","250","mA"
"Protections","PTO","Delay","1800","s"
"Protections","PTO","Reset","2","userAh"
"Permanent Fail","CUDEP","Threshold","1500","mV"
"Permanent Fail","CUDEP","Delay","2","s"
"Permanent Fail","SUV","Threshold","2200","mV"
"Permanent Fail","SUV","Delay","5","s"
"Permanent Fail","SOV","Threshold","4500","mV"
"Permanent Fail","SOV","Delay","5","s"
"Permanent Fail","TOS","Threshold","100","mV"
"Permanent Fail","TOS","Delay","5","s"
"Permanent Fail","SOCC","Threshold","10000","userA"
"Permanent Fail","SOCC","Delay","5","s"
"Permanent Fail","SOCD","Threshold","-32000","userA"
SLUA991 – December 2019
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Easy Configuration of BQ76942/52 Battery Monitors
Copyright © 2019, Texas Instruments Incorporated
13
Advance Information
References
www.ti.com
"Permanent Fail","SOCD","Delay","5","s"
"Permanent Fail","SOT","Threshold","65","°C"
"Permanent Fail","SOT","Delay","5","s"
"Permanent Fail","SOTF","Threshold","85","°C"
"Permanent Fail","SOTF","Delay","5","s"
"Permanent Fail","VIMR","Check Voltage","3500","mV"
"Permanent Fail","VIMR","Max Relax Current","10","mA"
"Permanent Fail","VIMR","Threshold","500","mV"
"Permanent Fail","VIMR","Delay","5","s"
"Permanent Fail","VIMR","Relax Min Duration","100","s"
"Permanent Fail","VIMA","Check Voltage","3700","mV"
"Permanent Fail","VIMA","Min Active Current","50","mA"
"Permanent Fail","VIMA","Threshold","200","mV"
"Permanent Fail","VIMA","Delay","5","s"
"Permanent Fail","CFETF","OFF Threshold","20","mA"
"Permanent Fail","CFETF","OFF Delay","5","s"
"Permanent Fail","DFETF","OFF Threshold","-20","mA"
"Permanent Fail","DFETF","OFF Delay","5","s"
"Permanent Fail","VSSF","Fail Threshold","100","-"
"Permanent Fail","VSSF","Delay","5","s"
"Permanent Fail","2LVL","Delay","5","s"
"Permanent Fail","LFOF","Delay","5","s"
"Permanent Fail","HWMX","Delay","5","s"
"Security","Settings","Security Settings","00","Hex"
"Security","Keys","Unseal Key Step 1","0414","Hex"
"Security","Keys","Unseal Key Step 2","3672","Hex"
"Security","Keys","Full Access Key Step 1","ffff","Hex"
"Security","Keys","Full Access Key Step 2","ffff","Hex"
4
References
•
•
•
•
14
BQ76942
BQ76952
BQ76942
BQ76952
Device Data Sheet
Device Data Sheet
Evaluation Module User's Guide
Evaluation Module User's Guide
Easy Configuration of BQ76942/52 Battery Monitors
Copyright © 2019, Texas Instruments Incorporated
SLUA991 – December 2019
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